[PATCH] tests: add prefixes to the bare mkdtemp calls

["Alex Bennée" <alex.bennee@linaro.org>]

The first step to debug a thing is to know what created the thing in
the first place. Add some prefixes so random tmpdir's have something
grep in the code.

Signed-off-by: Alex Bennée <alex.bennee@hackbox2.linaro.org>
---
 python/qemu/machine.py                    | 2 +-
 tests/acceptance/avocado_qemu/__init__.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/python/qemu/machine.py b/python/qemu/machine.py
index 6420f01bed..052a77592c 100644
--- a/python/qemu/machine.py
+++ b/python/qemu/machine.py
@@ -303,7 +303,7 @@ class QEMUMachine:
         return args
 
     def _pre_launch(self) -> None:
-        self._temp_dir = tempfile.mkdtemp(dir=self._test_dir)
+        self._temp_dir = tempfile.mkdtemp(prefix="qemu-machine-", dir=self._test_dir)
         self._qemu_log_path = os.path.join(self._temp_dir, self._name + ".log")
         self._qemu_log_file = open(self._qemu_log_path, 'wb')
 
diff --git a/tests/acceptance/avocado_qemu/__init__.py b/tests/acceptance/avocado_qemu/__init__.py
index 4cda037187..8496a0c43d 100644
--- a/tests/acceptance/avocado_qemu/__init__.py
+++ b/tests/acceptance/avocado_qemu/__init__.py
@@ -171,7 +171,7 @@ class Test(avocado.Test):
             self.cancel("No QEMU binary defined or found in the build tree")
 
     def _new_vm(self, *args):
-        vm = QEMUMachine(self.qemu_bin, sock_dir=tempfile.mkdtemp())
+        vm = QEMUMachine(self.qemu_bin, sock_dir=tempfile.mkdtemp(prefix="avocado_qemu_sock_"))
         if args:
             vm.add_args(*args)
         return vm
-- 
2.20.1